Instinct
Flow Sensor Replacement
2
1. Preliminary Instructions
1. Verify that the pressure sensor replacement kit is
correct for the model of boiler. See table on page 1.
2. Carefully open and unpack the PARTS BOX from its
shipping carton.
3. Carefully remove and check for any damage.
NOTICE
Installing a damaged sensor will cause malfunction of the
boiler. Contact Triangle Tube right away if the pressure sen-
sor damaged in any way.
4. Turn off the electrical power supply to the boiler.
5. Close the manual gas shut off valve to the unit.
2. Drain the boiler
1. Turn power to the unit “OFF”
2. Close all isolation valves on the system piping to
the boiler. Close the fill valve line to the system.
3. Connect a garden hose to the boiler drain.
4. Direct the hose to a suitable place of drainage. En-
sure boiler drain connection is between the boiler
and the closed isolation valve.
5. Open the drain valve and begin draining the boiler.
WARNING
!
Water from the boiler drain connection may be ex-
tremely hot. To avoid personal injury, death or sub-
stantial property damage:
- Tighten all drain hose connections to avoid leakage.
- Direct hot water away from all persons.
3. Pressure Sensor Removal
1. Remove the screw from the bottom of the front
panel. Remove the front panel of the boiler. Pull
the panel up and forward to remove the front pan-
el from the unit. Do not discard the screws.
Fig. 2: Flow Sensor Installation
2. Disconnect the wire harness from the flow sensor
by pulling back the locking clip and pulling the
harness out.
NOTICE
Take care to ensure the wiring and harness are not damaged.
3. Pull the lock pin below the Sensor out and pull the
pressure sensor out.
NOTICE
Do not pull the flow sensor out by the wire connection. This
can damage the plug.
NOTICE
If the flow sensor is stuck, gently pry the sensor out using a
screwdriver or the lock pin
4. Flow Sensor Installation
1. Ensure the wheel is installed on the new flow sen-
sor and spins freely.
2. Insert the new sensor with the wheel into the con-
nection. Insert the locking pin to secure in place.
3. Reconnect the wiring harness to the sensor.
